Most of us play several characters at once. Often your read new messages during the day but are unable to answer right away. Sometimes you just forget to answer to roleplay or personal messages, which get buried in the message avalanche. I think we could use a feature that would allow us tag messages we want to not forget reply to later.
How it will work:
There'll be another small button/star icon under each message. When you click it, that message is tagged. When you finally have time for roleplay/verbous letters, you go to "Messages" screen and click an "Ask your squire to bring you the letters you have put aside to reply later" option and see all the messages you have thus previously tagged.
Now you'll never forget to reply to important messages and will have easier time finding them when you've got time to reply!
